# Mechanical Engineering - Theory of machines

### Exercise :: Theory of machines - Section 9

1.

The dedendum circle diameter is equal to (where φ = Pressure angle)

 A. pitch circle dia. x cos φ B. addendum circle dia. x cos φ C. clearance circle dia. x cos φ D. pitch circle dia. x sin φ

Explanation:

No answer description available for this question. Let us discuss.

2.

The ratio of the maximum displacement of the forced vibration to the deflection due to the static force, is known as

 A. damping factor B. damping coefficient C. logarithmic decrement D. magnification factor

Explanation:

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3.

The tractive force is maximum or minimum when the angle of inclination of crank with the line of stroke (θ) is equal to

 A. 0° and 90° B. 90° and 180° C. 135° and 315° D. 270° and 360°

Explanation:

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4.

A point on a connecting link (excluding end points) of a double slider crank mechanism traces a

 A. straight line path B. hyperbolic path C. parabolic path D. elliptical path

Explanation:

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5.

The coefficient of friction is the ratio of the limiting friction to the normal reaction between the two bodies.

 A. Correct B. Incorrect